Given the task definition and input, reply with output. In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: The bamboos are evergreen perennial flowering plants in the subfamily Bambusoideae of the grass family Poaceae. In bamboo, as in other grasses, the internodal regions of the stem are usually hollow and the vascular bundles in the cross section are scattered throughout the stem instead of in a cylindrical arrangement. The dicotyledonous woody xylem is also absent. The absence of secondary growth wood causes the stems of monocots, including the palms and large bamboos, to be columnar rather than tapering., The Orchidaceae are a diverse and widespread family of flowering plants, with blooms that are often colourful and often fragrant, commonly known as the orchid family., A panicle is a much-branched inflorescence. Some authors distinguish it from a compound spike, by requiring that the flowers (and fruit) be pedicellate. The branches of a panicle are often racemes. A panicle may have determinate or indeterminate growth., Asteraceae or Compositae (commonly referred to as the aster, daisy, composite, or sunflower family) is an exceedingly large and widespread family of flowering plants (Angiospermae)., Connation in plants is the developmental fusion of organs of the same type, for example, petals to one another to form a tubular corolla. This is in contrast to adnation, the fusion of dissimilar organs. Such organs are described as connate or adnate, respectively. When like organs that are usually well separated are placed next to each other, but not actually connected, they are described as connivent (that is the case for anthers in several genera, such as "Solanum")., A raceme (or ) is an unbranched, indeterminate type of inflorescence bearing "pedicellate" flowersflowers having short floral stalks called pedicelsalong its axis. In botany, an "axis" means a shoot, in this case one bearing the flowers. In indeterminate inflorescence-like racemes, the oldest flowers are borne towards the base and new flowers are produced as the shoot grows, with no predetermined growth limit. A plant that flowers on a showy raceme may have this reflected in its scientific name, e.g. "Cimicifuga racemosa". A compound raceme, also called a panicle, has a branching main axis. Examples of racemes occur on mustard (genus "Brassica") and radish (genus "Raphanus") plants., Binomial nomenclature (also called binominal nomenclature or binary nomenclature) is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a binomial name (which may be shortened to just "binomial"), a binomen or a scientific name; more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs; the second part identifies the species within the genus. For example, humans belong to the genus "Homo" and within this genus to the species "Homo sapiens". The "formal" introduction of this system of naming species is credited to Carl Linnaeus, effectively beginning with his work "Species Plantarum" in 1753. But Gaspard Bauhin, in as early as 1623, had introduced in his book "Pinax theatri botanici" (English, "Illustrated exposition of plants") many names of genera that were later adopted by Linnaeus., In botany, shoots consist of stems including their appendages, the leaves and lateral buds, flowering stems and flower buds. The new growth from seed germination that grows upward is a shoot where leaves will develop. In the spring, perennial plant shoots are the new growth that grows from the ground in herbaceous plants or the new stem or flower growth that grows on woody plants., Calamagrostis ( small reed or reed grass ) is a genus in the grass family Poaceae , with about 260 species that occur mainly in temperate regions of the globe . Towards equatorial latitudes , species of Calamagrostis generally occur at higher elevations . These tufted perennials usually have hairless narrow leaves . The ligules are usually blunt . The inflorescence forms a panicle . Some may be reed - like . The plants may be rhizomatous ( underground stems with shoots ) , stoloniferous ( with runners ) , or caespitose ( growing in tufts or clumps ) . The bisexual spikelets have a single floret and generally they are purple or purple - brown . The spikelets are clustered into inflorescences , which usually develop in early - to mid-summer on long culms ( = stems ) . Some Calamagrostis can be very decorative ; for example , in North America , Britain and Europe , a hybrid cultivar of Calamagrostis ( Calamagrostis x acutiflora ' Karl Foerster ' ) is widely grown as an ornamental grass . The word `` calamagrostis '' is derived from the Greek word kalamos ( reed ) and agrostis ( a kind of grass ) . Many species of Calamagrostis are morphologically similar , but they generally occur in distinct habitats , and they have unique geographical distributions . Given the subtle distinctions between many closely related taxa , there are several species complexes that could benefit from additional systematic study . Even the generic boundaries of the genus are controversial . For example , species in the genus Deyeuxia , distributed largely in the southern hemisphere are morphologically very similar to species of Calamagrostis . It may be appropriate to recognize all of these species in a single genus , but this will require detailed scientific study of DNA of species from around the world ., A flower, sometimes known as a bloom or blossom, is the reproductive structure found in plants that are floral (plants of the division Magnoliophyta, also called angiosperms). The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs. Flowers may facilitate outcrossing (fusion of sperm and eggs from different individuals in a population) or allow selfing (fusion of sperm and egg from the same flower). Some flowers produce diaspores without fertilization (parthenocarpy). Flowers contain sporangia and are the site where gametophytes develop. Many flowers have evolved to be attractive to animals, so as to cause them to be vectors for the transfer of pollen. After fertilization, the ovary of the flower develops into fruit containing seeds., In botany, a fruit is the seed-bearing structure in flowering plants (also known as angiosperms) formed from the ovary after flowering., The Rubiaceae are a family of flowering plants, commonly known as the coffee, madder, or bedstraw family. It consists of terrestrial trees, shrubs, lianas, or herbs that are recognizable by simple, opposite leaves with interpetiolar stipules. The family contains about 13,500 species in 611 genera, which makes it the fourth-largest angiosperm family. Rubiaceae has a cosmopolitan distribution, however, the largest species diversity is concentrated in the (sub)tropics. Economic importance includes "Coffea", the source of coffee, "Cinchona", the source of the antimalarial alkaloid quinine, some dye plants (e.g. "Rubia"), and ornamental cultivars (e.g. "Gardenia", "Ixora", "Pentas")., A lawn is an area of soil-covered land planted with grasses or (rarely) other durable plants such as clover which are maintained at a short height with a lawnmower and used for aesthetic and recreational purposes. Common characteristics of a lawn are that it is composed only of grass species, it is subject to weed and pest control, it is subject to practices aimed at maintaining its green color (e.g., watering), and it is regularly mowed to ensure an acceptable length, although these characteristics are not binding as a definition. Lawns are used around houses, apartments, commercial buildings and offices. Many city parks also have large lawn areas. In recreational contexts, the specialised names turf, pitch, field or green may be used, depending on the sport and the continent., An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified. The modifications can involve the length and the nature of the internodes and the phyllotaxis, as well as variations in the proportions, compressions, swellings, adnations, connations and reduction of main and secondary axes.
Inflorescence can also be defined as the reproductive portion of a plant that bears a cluster of flowers in a specific pattern., In botany, phyllotaxis or phyllotaxy is the arrangement of leaves on a plant stem (from Ancient Greek "phýllon" "leaf" and "táxis" "arrangement"). Phyllotactic spirals form a distinctive class of patterns in nature., Poaceae or Gramineae is a large and nearly ubiquitous family of monocotyledonous flowering plants known as grasses. Poaceae includes the cereal grasses, bamboos and the grasses of natural grassland and cultivated lawns (turf) and pasture. Grasses have stems that are hollow except at the nodes and narrow alternate leaves borne in two ranks. The lower part of each leaf encloses the stem, forming a leaf-sheath. With ca 780 genera and around 12,000 species, Poaceae are the fifth-largest , following the Asteraceae, Orchidaceae, Fabaceae and Rubiaceae., A genus ( genera) is a taxonomic rank used in the biological classification of living and fossil organisms in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus., Poa is a genus of about 500 species of grasses, native to the temperate regions of both hemispheres. Common names include meadow-grass (mainly in Europe and Asia), bluegrass (mainly in North America), tussock (some New Zealand species), and speargrass. "Poa" is Greek for fodder. "Poa" are members of the Pooideae subfamily of the Poaceae family., A cereal is any grass cultivated for the edible components of its grain (botanically, a type of fruit called a caryopsis), composed of the endosperm, germ, and bran. Cereal grains are grown in greater quantities and provide more food energy worldwide than any other type of crop and are therefore staple crops. Edible grains from other plant families, such as buckwheat (Polygonaceae), quinoa (Amaranthaceae) and chia (Lamiaceae), are referred to as pseudocereals., The Fabaceae, Leguminosae or Papilionaceae, commonly known as the legume, pea, or bean family, are a large and economically important family of flowering plants. It includes trees, shrubs, and perennial or annual herbaceous plants, which are easily recognized by their fruit (legume) and their compound, stipulated leaves. The family is widely distributed, and is the third-largest land plant family in terms of number of species, behind only the Orchidaceae and Asteraceae, with about 751 genera and some 19,000 known species
. The five largest of the genera are "Astragalus" (over 3,000 species), "Acacia" (over 1000 species), "Indigofera" (around 700 species), "Crotalaria" (around 700 species) and "Mimosa" (around 500 species), which constitute about a quarter of all legume species. The ca. 19,000 known legume species amount to about 7% of flowering plant species. Fabaceae is the most common family found in tropical rainforests and in dry forests in the Americas and Africa., Grasslands are areas where the vegetation is dominated by grasses (Poaceae), however sedge (Cyperaceae) and rush (Juncaceae) families can also be found. Grasslands occur naturally on all continents except Antarctica. Grasslands are found in most ecoregions of the Earth. For example, there are five terrestrial ecoregion classifications (subdivisions) of the temperate grasslands, savannas, and shrublands biome (ecosystem), which is one of eight terrestrial ecozones of the Earth's surface., In biology, an organism is any contiguous living system, such as an animal, plant, fungus, archaeon, or bacterium. All known types of organisms are capable of some degree of response to stimuli, reproduction, growth and development and homeostasis. An organism consists of one or more cells; when it has one cell it is known as a unicellular organism; and when it has more than one it is known as a multicellular organism. Most unicellular organisms are of microscopic scale and are thus loosely described as microorganisms. Humans are multicellular organisms composed of many trillions of cells grouped into specialized tissues and organs., Subject: calamagrostis, Relation: parent_taxon, Options: (A) amaranthaceae (B) angiospermae (C) angiosperms (D) animal (E) area (F) areas (G) aster (H) asteraceae (I) axis (J) bambusoideae (K) cinchona (L) coffea (M) crotalaria (N) cyperaceae (O) fabaceae (P) gardenia (Q) homo (R) indigofera (S) lamiaceae (T) magnoliophyta (U) mimosa (V) orchidaceae (W) pea (X) pentas (Y) plant (Z) poa ([) poaceae (\) polygonaceae (]) pooideae (^) rubiaceae (_) seed plants (`) solanum

pooideae